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The GED science test: what's covered and how it works

It's 90 minutes with no break and about 34 to 40 questions. The GED science test covers life science, physical science, and Earth and space science, and most of what you need is in the passage, table or graph in front of you. You don't have to memorize formulas.

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Updated October 2026 · Written from official sources, listed at the bottom of this page

How many questions are on the GED science test?

About 34 to 40, according to GED Testing Service's blog, and the number varies a little by version. The 90 minutes include 2 minutes of instructions and final review. About half the questions come in small sets of two or three that share one passage, graph or diagram, and the other half stand alone.

What it tests

GED.com lists three skills: reading for meaning in science, designing and interpreting experiments, and using numbers and graphics. In practice that means finding the main idea of a passage, spotting the variables and the control in an experiment, and reading data from a table or graph. GED Testing Service's Assessment Guide for Educators (October 2020 edition) puts the split at about:

Content areaShare of the test
Life scienceAbout 40%
Physical scienceAbout 40%
Earth and space scienceAbout 20%

Calculator and question types

You get an on-screen TI-30XS calculator and a calculator reference sheet, or you can bring your own TI-30XS at a test center. Questions are multiple choice, fill in the blank, drag and drop, select an area and drop down.

GED.com says the science test has a 90% pass rate, which makes it a good subject to take early if you want a win.

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Sources: GED Testing Service, GED Testing Service blog and 2 more. Checked October 2026.

Rules and fees can change, so check the official site before your test.